Here's the question you clicked on:
badreferences
Why is a projective representation of hyberbolic geometry convex towards the sphere's center?
I would help you but IDK
dude is this a legitimate concept? i doubt it.
Yes. With hyperbolic geometries you want to project hemispheres to 2D for measurement, etc. Generally in physics you learn Minkowski space ( http://en.wikipedia.org/wiki/Minkowski_space ) but there are also conformal and hemispherical projections. Conformal is a plane orthogonal to the plane bisecting the sphere into northern and southern hemispheres. Hemispheric is a stereographic projection from the southern pole. A 3D "Euclidian" model of the sphere "squashing" the hyperbolic geometries has the hemispheric projection act as a convex "plate" directed towards the center of the sphere. My question is why.
well why didn't you ask this in physics?
Because this isn't physics, it's math.
lol what math do they teach this in?